ISBN-13: 9783639128369 / Angielski / Miękka / 2009 / 192 str.
The imperfect trench installation method has beenused to reduce earth pressure on deeply buriedconduits. Few quantitative refinements to theimperfect trench installation method, however, havebeen added since the fundamental mechanics of thereverse arching action was proposed by Marston andSpangler. It was found during the course of thisstudy that significant frictional forces developalong the sidewalls of buried conduits and adjacentsidefills in imperfect trench installations. CurrentAmerican Association of State Highway andTransportation Officials provisions do not considerthese frictional forces, but they cannot be neglectedin imperfect trench installations as their effect isdominant. The objectives of this study were to studythe soil-structure interaction for deeply buriedroadway conduits (concrete pipes, corrugatedpolyvinyl chloride (PVC) pipes, corrugated steelpipes, and box culverts) and the efficiency of theimperfect trench method for their installations. This research identifies variables that significantlyaffect earth loads, as well as the effects of beddingand sidefill treatments.